A film-applying device for lead frames

Abstract

This invention relates to the field of lead frame film application technology, specifically disclosing a film application device for lead frames, comprising: a right-angle support plate, a lead frame conveyor, a lead frame film application machine, a pressing device, and a cutting device. The right-angle support plate supports the operation of the entire device. The lead frame conveyor is located at the center of the top surface of the bottom of the right-angle support plate. The lead frame film application machine is located at the bottom inner side of the right-angle support plate, and is directly above the lead frame conveyor with a certain distance. The pressing device is located at the center of the top inner side of the right-angle support plate, and is capable of pressing down on the lead frame for film application. The cutting device is sleeved on the outer wall of the moving end of the pressing device, and is capable of cutting the lead frame film application machine along the four sides of the moving end of the pressing device. This invention improves the versatility and accuracy of cutting after lead frame film application, and improves the film application quality of the lead frame.

Description

Technical Field

[0001] This invention relates to the field of lead frame film application technology, specifically to a film application device for lead frames. Background Technology

[0002] Currently, traditional leadframe bonding devices suffer from numerous problems in practical applications. Firstly, regarding bonding pressure control, traditional devices employ a uniform bonding pressure across the entire system. However, leadframes typically contain different material areas, such as ceramic and copper regions, each requiring different bonding pressures. Using the same pressure leads to poor bonding results in the ceramic and copper regions, resulting in loose adhesion and severely impacting the overall performance and product quality of the leadframe. Secondly, in the bonding cutting stage, existing cutting devices lack adaptability to bonding heads of different sizes, exhibiting poor versatility. Furthermore, during the cutting process, it is difficult to precisely cut along the edge of the bonding head, easily leading to uneven cuts and bonding breakage. Summary of the Invention

[0003] The purpose of this invention is to provide a film-applying device for a lead frame to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a film-applying device for a lead frame, comprising: a right-angle support plate, a lead frame conveyor, a lead frame film-applying machine, a pressing device, and a cutting device. The right-angle support plate supports the operation of the entire device. The lead frame conveyor is located at the center of the top surface of the bottom of the right-angle support plate. The lead frame film-applying machine is located at the bottom inner side of the right-angle support plate, and is positioned directly above the lead frame conveyor with a certain distance between them. The pressing device is located at the center of the top inner side of the right-angle support plate, and is capable of pressing down on the lead frame to apply the film. The cutting device is sleeved on the outer wall of the moving end of the pressing device, and is capable of cutting the lead frame film-applying machine along the four sides of the moving end of the pressing device.

[0005] Preferably, for applying a film to the lead frame, the pressing device includes: a rectangular support block, a first chamber, a support plate, a rotating column, a first driving assembly, a second driving assembly, and a pressing head. The rectangular support block is located at the center of the top inner side of the right-angled support plate, and the first chamber is formed inside the rectangular support block. The support plate is located at one end of the inner wall of the first chamber. The rotating column is located at the center of the outer wall of the support plate via a first bearing, and both ends of the rotating column extend outwards. The first driving assembly is located at the right end of the rotating column. The second driving assembly is located at the left end of the rotating column. The pressing head is located at the moving end of the second driving assembly.

[0006] Preferably, to adjust the pressure of the contact head, the first drive assembly includes: a first gear, a support platform, a second gear, a first brake motor, a cylindrical block, a grooved plate, an L-shaped block, a large gear, a small gear, a second brake motor, and a first rack. The first gear is located at the right end of the rotating column; the support platform is located at the center of the bottom right side of the outer wall of the support plate; there are two second gears, each located at the right corner of both ends of the support platform via two second bearings; there are two first brake motors, each located at the bottom right corner of both ends of the support platform, with the output ends of the two first brake motors penetrating the bottom of the support platform and respectively connected and fixed to the two second gears; the cylindrical block is located on the support platform. The top surface is centered on the right end; a grooved plate is disposed on the top surface of the cylindrical block; two L-shaped blocks are respectively embedded in the two ends of the grooved plate, and both L-shaped blocks can be limited to move along the groove of the grooved plate; a large gear is disposed on the top left end of one L-shaped block through a second bearing; a small gear is disposed on the top left end of the other L-shaped block through a third bearing; two second brake motors are respectively disposed on the top right ends of the two L-shaped blocks, and the output ends of the two second brake motors are respectively connected and fixed to the right ends of the large gear and the small gear; two first racks are respectively disposed on one end of the bottom side of the two L-shaped blocks, and the two first racks respectively mesh with the two second gears.

[0007] Preferably, one of the first brake motors rotates to drive a second gear, which in turn drives an L-shaped block to move at one end of the groove in the slotted plate via a first rack, thereby causing the large gear to contact and mesh with the first gear. The rotation of the second brake motor drives the first gear through the large gear, causing the rotating column to rotate. The other first brake motor rotates to drive a small gear to contact and mesh with the first gear, and the rotation of the second brake motor causes the rotating column to rotate.

[0008] Preferably, in order to drive the bonding head to apply film to the lead frame, the second driving assembly includes: a first connecting rod, a second connecting rod, and a moving rod. The first connecting rod is disposed at the left end of the rotating column; the second connecting rod is disposed at the top left side of the first connecting rod via a fourth bearing; the moving rod is disposed at the bottom right side of the second connecting rod via a fifth bearing. The moving rod extends outward through the bottom surface of the outer wall of the rectangular support block, and the moving rod can be limited to move within the bottom surface of the rectangular support block. The rotation of the rotating column drives the first connecting rod to drive the second connecting rod to move the moving rod up and down to a limited position, thereby driving the bonding head to move up and down.

[0009] Preferably, for cutting excess film from the lead frame, the cutting device includes: a rectangular block, a second chamber, a moving groove, a third drive assembly, an electric push rod, a rectangular rod, a T-shaped groove 510, a fourth drive assembly, and a fifth drive assembly. The rectangular block is fitted onto the bottom outer wall of the moving rod. The second chamber is formed inside the rectangular block. Moving grooves are formed at one bottom corner of both the front and rear ends of the rectangular block, and the two moving grooves are diagonally opposite. The third drive assembly is located at the bottom center of the second chamber, and the two moving ends of the third drive assembly are respectively embedded in the two moving grooves. There are two electric push rods, which are respectively set at the two moving ends of the third drive assembly. There are two rectangular rods, which are respectively set on the bottom surface of the two electric push rods, and a T-shaped groove is formed on one side of the outer wall of the two rectangular rods. There are two sets of fourth drive assemblies, which are respectively set symmetrically at one end of the two T-shaped grooves. The fifth drive assembly is set at one end of the bottom surface of the rectangular block.

[0010] Preferably, in order to cooperate with the fourth component, the third drive component includes: a third gear, a second rack, a first flat brake motor, and a fourth gear. The third gear is sleeved on the outer wall of the moving rod through a sixth bearing, and the third gear is located at the bottom center of the second chamber. There are two second racks, which are respectively disposed at the left and right ends of the third gear, and one end of each of the two second racks is embedded in a moving slot. The first flat brake motor is disposed on the top surface of the second chamber near the center. The fourth gear is disposed at the output end of the first flat brake motor, and the fourth gear meshes with the first flat brake motor.

[0011] Preferably, the first flat brake motor rotates to drive the fourth gear, which in turn drives the third gear to limit the extension and retraction of the two second racks within the two moving slots.

[0012] Preferably, in order to cut excess film along both sides of the bonding head, the fourth drive assembly includes: a third rack, a T-shaped rod, a bearing housing, a fifth gear, a third brake motor, a connecting block, and a cutter. The third rack is disposed on the bottom surface of the rectangular rod; one end of the T-shaped rod is embedded in the T-shaped groove, and the T-shaped rod can move within the T-shaped groove; the bearing housing is disposed on one end of the T-shaped rod; the fifth gear is disposed on one end of the rotating end of the bearing housing, and the fifth gear meshes with the third rack; the third brake motor is disposed on the other end of the rotating end of the bearing housing; the connecting block is disposed on the bottom surface of the bearing housing; the cutter is disposed on one end of the bottom surface of the connecting block; the third brake motor rotates to drive the fifth gear to move on the tooth surface of the third rack, and moves within the T-shaped groove through the T-shaped rod, thereby driving the cutter to move left and right.

[0013] Preferably, in order to cut the four sides of the excess film, the fifth drive assembly includes: a sixth gear, a right-angle plate, a second flat brake motor, and a seventh gear. The sixth gear is sleeved on the outer wall of the moving rod through a seventh bearing, and the top surface of the sixth gear is fixedly connected to the center of the bottom surface of the rectangular block. The right-angle plate is disposed at one end of the bottom surface of the rectangular block. The second flat brake motor is disposed at the center of the top surface of the bottom of the right-angle plate. The seventh gear is disposed at the output end of the second flat brake motor, and the seventh gear meshes with the sixth gear. The rotation of the second flat brake motor drives the seventh gear to rotate on the tooth surface of the outer wall of the sixth gear, thereby driving the rectangular block to rotate on the outer wall of the moving rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. Precise adjustment of film application pressure to improve film application quality: The pressing device of the present invention can control the rotation speed of the rotating column through the first driving component, and drive the pressing head to move up and down in combination with the second driving component to achieve precise adjustment of the film application pressure; by replacing the ceramic area pressing head module and the copper area pressing head module, it can apply appropriate pressure to different material areas of the lead frame, effectively solving the problem of loose bonding caused by uniform pressure in traditional devices, and significantly improving the film application quality.

[0016] 2. Enhanced Cutting Versatility and Precision: Through the coordinated operation of the third, fourth, and fifth drive components, the cutting device can cut off the excess film along the four sides of the outer wall of the laminating head. This design not only adapts to laminating heads of different sizes, offering versatility and flexibility, but also precisely cuts along the edge of the laminating head, avoiding uneven cuts and film breakage, significantly improving cutting accuracy and quality.

[0017] 3. Ensure continuous film application: During operation, the cutting device, through the cooperation of various drive components, will not cause the film inside the lead frame film applicator to break, ensuring the film application process continues stably and improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the position and structure of the pressing device of the present invention;

[0020] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the pressing device of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the diagram;

[0022] Figure 5This is a schematic diagram of the connection assembly structure of the two L-shaped blocks of the pressing device of the present invention;

[0023] Figure 6 This is a schematic diagram of the second driving structure of the pressing device of the present invention;

[0024] Figure 7 This is a schematic diagram of the second drive structure of the pressing device of the present invention.

[0025] Figure 8 This is a schematic diagram of the position and structure of the cutting device of the present invention;

[0026] Figure 9 This is a schematic diagram of the cutting device structure of the present invention;

[0027] Figure 10 This is a schematic diagram of the rectangular block cross-sectional structure of the cutting device of the present invention;

[0028] Figure 11 This is a schematic diagram of the internal structure of the rectangular block of the cutting device of the present invention.

[0029] Figure 12 For the present invention Figure 11 Enlarged view of the structure at point B in the diagram;

[0030] Figure 13 This is an exploded view of the fourth drive component of the cutting device of the present invention;

[0031] Figure 14 This is a schematic diagram of the fifth drive component of the cutting device of the present invention.

[0032] In the diagram: 1. Right-angle support plate; 2. Lead wire frame conveyor; 3. Lead wire frame film applicator; 4. Pressing device; 5. Cutting device; 41. Rectangular support block; 42. First chamber; 43. Support plate; 44. Rotating column; 45. First gear; 46. Support platform; 47. Second gear; 48. First brake motor; 49. Cylindrical block; 410. Channel plate; 411. L-shaped block; 412. Large gear; 413. Small gear; 414. Second brake motor; 415. First rack; 416. First connecting rod; 417. Second connecting rod; 418. Moving... 419. Moving rod; 51. Fitting pressure head; 52. Rectangular block; 53. Second chamber; 54. Moving groove; 55. Third gear; 56. Second rack; 57. First flat brake motor; 58. Fourth gear; 59. Electric push rod; 510. Rectangular rod; 511. T-shaped groove; 512. Third rack; 513. T-shaped rod; 514. Bearing seat; 515. Fifth gear; 516. Third brake motor; 517. Connecting block; 518. Cutter; 519. Sixth gear; 520. Right angle plate; 521. Second flat brake motor; 522. Seventh gear. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-14 This invention provides a film-applying device for lead frames, comprising: a right-angle support plate 1, a lead frame conveyor 2, a lead frame film applicator 3, a pressing device 4, and a cutting device 5. The right-angle support plate 1 supports the entire device and has a certain supporting force. The lead frame conveyor 2 is located at the center of the top surface of the bottom of the right-angle support plate 1, and is used to fix the lead frame and convey it. The lead frame film applicator 3 is located on the inner bottom of the right-angle support plate 1, and is located directly above the lead frame conveyor 2 at a certain distance. 3 is used for fixing and rolling the film; the pressing device 4 is located at the center of the top inside the right-angle support plate 1, and the pressing device 4 can press down on the lead frame to apply the film. The pressing device 4 can adjust the film application pressure on different areas of the ceramic and copper regions of the lead frame to improve the film application quality; the cutting device 5 is sleeved on the outer wall of the moving end of the pressing device 4, and the cutting device 5 can cut the lead frame film applicator 3 along the four sides of the moving end of the pressing device 4. The cutting device 5 can cooperate with the pressing device 4, and the cutting device 5 can cut along the four sides of the pressing head 419 inside the pressing device 4, thereby improving the cutting accuracy and cutting quality.

[0035] As a preferred option, further, such as Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the pressing device 4 includes: a rectangular support block 41, a first chamber 42, a support plate 43, a rotating column 44, a first driving assembly, a second driving assembly, and a pressing head 419. The rectangular support block 41 is located at the center of the top inside the right-angle support plate 1. The first chamber 42 is opened inside the rectangular support block 41. The rectangular support block 41 has a certain protective function for the internal components and also plays a certain supporting role. A support plate 43 is disposed at one end of the inner wall of the first chamber 42, and the support plate 43 provides certain support for the rotating column 44 and the left and right end connecting components. The rotating column 44 is disposed at the center of the outer wall of the support plate 43 through the first bearing, and the rotating column 44 can rotate through the first bearing, and both ends of the rotating column 44 extend outward. The first drive component is disposed at the right end of the rotating column 44. The second drive component is disposed at the left end of the rotating column 44. The bonding pressure head 419 is disposed at the moving end of the second drive component. The bonding pressure head 419 can replace the ceramic area pressure head module and the copper area pressure head module, and the length and width of the bonding pressure head 419 are the same as the length and width of the lead frame. The bonding pressure head 419 has a certain thickness, and the thickness can better match the two cutters 517.

[0036] As a preferred option, further, such as Figure 4 and Figure 5As shown, the first drive assembly includes: a first gear 45, a support platform 46, a second gear 47, a first brake motor 48, a cylindrical block 49, a grooved plate 410, an L-shaped block 411, a large gear 412, a small gear 413, a second brake motor 414, and a first rack 415. The first gear 45 is located at the right end of the rotating column 44. The support platform 46 is located at the center of the bottom right side of the outer wall of the support plate 43, and the support platform 46 provides certain support for the surface connecting parts. There are two second gears 47, which are respectively located at the right corners of both ends of the support platform 46 via two second bearings. There are two first brake motors 48, which are respectively located at the bottom right corners of both ends of the support platform 46. The output ends of the two first brake motors 48 are connected to the bottom right corners of the support platform 46. Two first brake motors 48 are connected and fixed to the bottom of the support platform 46 and two second gears 47 respectively. Both first brake motors 48 have independent outputs and a certain self-locking capability to ensure the stable operation of the large gear 412 and the small gear 413. A cylindrical block 49 is located at the center of the right end of the top surface of the support platform 46. The cylindrical block 49 ensures that the centers of the first gear 45, the large gear 412, and the small gear 413 are on the same horizontal line. A grooved plate 410 is located on the top surface of the cylindrical block 49 and is used to support and limit the movement of two L-shaped blocks 411. There are two L-shaped blocks 411, each embedded in one end of the grooved plate 410, and both L-shaped blocks 411 can move along the groove of the grooved plate 410. The bottom ends of the L-shaped block 411 have friction with the sides that contact the groove of the channel plate 410, which serves to fix it in place. A large gear 412 is mounted on the top left end of one L-shaped block 411 via a second bearing. The large gear 412 is larger than the first gear 45, resulting in a higher rotational speed for the first gear 45 when driven by the large gear 412. A small gear 413 is mounted on the top left end of another L-shaped block 411 via a third bearing. The small gear 413 is smaller than the first gear 45, resulting in a lower rotational speed for the first gear 45 when driven by the small gear 413. Two second brake motors 414 are respectively mounted on the top right ends of the two L-shaped blocks 411. The output ends of the two second brake motors 414 are respectively connected and fixed to the right ends of the large gear 412 and the small gear 413. The two second brake motors 414 have a certain self-locking capability. There are two first racks 415, which are respectively set at one end of the bottom side of the two L-shaped blocks 411. The two first racks 415 mesh with the two second gears 47 respectively. The rotation of one first brake motor 48 drives one second gear 47 to limit the movement of one end of the L-shaped block 411 in the groove of the slotted plate 410 through one first rack 415, so that the large gear 412 and the first gear 45 come into contact and mesh with each other. The rotation of one second brake motor 414 drives the first gear 45 through the large gear 412 to rotate the rotating column 44.Another first brake motor 48 rotates to drive a small gear 413 to contact and mesh with the first gear 45, and a second brake motor 414 rotates to rotate the rotating column 44. The first drive assembly controls the rotational speed of the first gear 45, thereby controlling the rotational speed of the rotating column 44, through the principle of a larger gear driving a smaller gear and a smaller gear driving a larger gear.

[0037] As a preferred option, further, such as Figure 6 and Figure 7 As shown, the second drive assembly includes: a first connecting rod 416, a second connecting rod 417, and a moving rod 418. The first connecting rod 416 is located at the left end of the rotating column 44. The second connecting rod 417 is located on the top left side of the first connecting rod 416 via a fourth bearing. The second connecting rod 417 offsets the rotational force on the moving rod 418 via the fourth and fifth bearings, thus generating only up-and-down pushing and pulling forces on the moving rod 418. The moving rod 418 is located on the bottom right side of the second connecting rod 417 via a fifth bearing. The moving rod 418 extends outward through the bottom surface of the outer wall of the rectangular support block 41, and can be limited to move within the bottom surface of the rectangular support block 41. The rotation of the rotating column 44 drives the first connecting rod 416 to drive the second connecting rod 417, causing the moving rod 418 to move up and down to a limited position, thereby driving the bonding head 419 to move up and down. The second drive assembly controls the pressure of the bonding head 419 on the lead frame by the rotation speed of the rotating column 44.

[0038] As a preferred option, further, such as Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 14As shown, the cutting device 5 includes: a rectangular block 51, a second chamber 52, a moving groove 53, a third drive assembly, an electric push rod 58, a rectangular rod 59, a T-shaped groove 510, a fourth drive assembly, and a fifth drive assembly. The rectangular block 51 is sleeved on the bottom outer wall of the moving rod 418. The second chamber 52 is formed inside the rectangular block 51. Moving grooves 53 are formed at one bottom corner of both the front and rear ends of the rectangular block 51, and the two moving grooves 53 are diagonally opposite. The rectangular block 51 protects the internal connecting components and also provides some support for the internal connecting components. The third drive assembly is located in the bottom of the second chamber 52. The third drive component has two moving ends embedded in two moving slots 53 respectively; there are two electric push rods 58, which are respectively set at the two moving ends of the third drive component. The two electric push rods 58 can push two rectangular rods 59 respectively, and the two electric push rods 58 have a certain self-locking ability; there are two rectangular rods 59, which are respectively set on the bottom surface of the two electric push rods 58, and T-shaped grooves 510 are respectively opened on one side of the outer wall of the two rectangular rods 59; there are two sets of fourth drive components, which are respectively set symmetrically at one end in the two T-shaped grooves 510; and the fifth drive component is set at one end of the bottom surface of the rectangular block 51.

[0039] As a preferred option, further, such as Figure 10 and Figure 11 As shown, the third drive assembly includes: a third gear 54, a second rack 55, a first flat brake motor 56, and a fourth gear 57. The third gear 54 is sleeved on the outer wall of the moving rod 418 through a sixth bearing, and the third gear 54 is located at the bottom center of the second chamber 52. There are two second racks 55, which are respectively set at the left and right ends of the third gear 54, and one end of each second rack 55 is embedded in a moving slot 53. The first flat brake motor 56 is set on the top surface of the second chamber 52 near the center. The first flat brake motor 56 has a certain self-locking capability and occupies a small space. The fourth gear 57 is set at the output end of the first flat brake motor 56, and the fourth gear 57 meshes with the first flat brake motor 56. The rotation of the first flat brake motor 56 drives the fourth gear 57, which causes the third gear 54 to drive the two second racks 55 to extend and retract within the two moving slots 53 respectively.

[0040] As a preferred option, further, such as Figure 12 and Figure 13As shown, the fourth drive assembly includes: a third rack 511, a T-shaped rod 512, a bearing housing 513, a fifth gear 514, a third brake motor 515, a connecting block 516, and a cutter 517. The third rack 511 is disposed on the bottom surface of the rectangular rod 59; one end of the T-shaped rod 512 is embedded in the T-shaped groove 510, and the T-shaped rod 512 matches the T-shaped groove, allowing it to move within the T-shaped groove 510; the bearing housing 513 is disposed on one end of the T-shaped rod 512; the fifth gear 514 is disposed on one end of the rotating end of the bearing housing 513, and the fifth gear 514 can rotate through the bearing housing 513, meshing with the third rack 511; the third brake motor 515 is disposed on the other end of the rotating end of the bearing housing 513, and the third brake motor 515 has a certain self-locking capability; the connecting block 516 is disposed on the bottom surface of the bearing housing 513, connecting... Block 516 supports the cutter 517. The cutter 517 is located at one end of the bottom surface of the connecting block 516 and can cut the film applied by the lead frame film applicator 3. The third brake motor 515 rotates and drives the fifth gear 514 to move on the tooth surface of the third rack 511 and moves within the T-shaped groove 510 through the T-shaped rod 512, thereby driving the cutter 517 to move left and right. The third drive assembly and the fourth drive assembly can cut the excess film of the lead frame after film application along the four sides of the outer wall of the bonding pressure head 419. The cooperation of the third drive assembly and the fourth drive assembly can match and cut different sizes of bonding pressure heads 419, which has a certain degree of versatility and flexibility, and improves the cutting accuracy and cutting quality. At the same time, the cooperation of the third drive assembly and the fourth drive assembly will not cause the film inside the lead frame film applicator 3 to break, so that it can continue to operate.

[0041] As a preferred option, further, such as Figure 14 As shown, the fifth drive assembly includes: a sixth gear 518, a right-angle plate 519, a second flat brake motor 520, and a seventh gear 521. The sixth gear 518 is sleeved on the outer wall of the moving rod 418 via a seventh bearing, and the top surface of the sixth gear 518 is fixedly connected to the center of the bottom surface of the rectangular block 51. The right-angle plate 519 is located at one end of the bottom surface of the rectangular block 51, and the right-angle plate 519 provides some support for its connecting parts. The second flat brake motor 520 is located at the center of the top surface of the bottom of the right-angle plate 519. 520 has a certain self-locking capability, and the second flat brake motor 520 occupies a small area; the seventh gear 521 is set at the output end of the second flat brake motor 520, and the seventh gear 521 meshes with the sixth gear 518; the second flat brake motor 520 rotates to drive the seventh gear 521 to rotate on the outer tooth surface of the sixth gear 518, thereby driving the rectangular block 51 to rotate on the outer wall of the moving rod 418. The fifth drive assembly cuts the film on the four sides of the lead frame film applicator 3 by rotating the rectangular block 51.

[0042] The detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process. The specific operation is as follows: Since the overall film-applying pressure of the traditional lead frame is the same, and the pressure of the ceramic area and copper area of ​​the lead frame are different, the film-applying quality of the ceramic area and copper area of ​​the lead frame is not good. The lead frame is fixed by the lead frame conveyor 2 and moved to the position directly below the bonding head 419. The copper area module is replaced by the bonding head 419. A first brake motor 48 drives the large gear 412 to contact and mesh with the first gear 45. A second brake motor 414 drives the first gear 45 to rotate. At this time, the first gear 45... The rotational speed increases, and the bonding pressure head 419 exerts greater pressure on the copper area of ​​the lead frame through the transmission of the first connecting rod 416, the second connecting rod 417, and the moving rod 418. The lead frame bonding machine 3 then applies pressure and bonding to the copper area of ​​the lead frame. When the bonding pressure head 419 replaces the ceramic area module, similarly, another first brake motor 48 drives the pinion 413 to engage with the first gear 45, and another second brake motor 414 drives the first gear 45 to rotate, reducing the rotational speed of the first gear 45. This results in less pressure from the bonding pressure head 419 on the ceramic area of ​​the lead frame. Therefore, this device improves the bonding quality in different areas of the lead frame and enhances the overall quality of the lead frame. Film application quality: The film is applied to the lead frame, and the bonding head 419 is bonded to the lead frame. The first flat brake motor 56 drives two electric push rods 58, which in turn move two rectangular rods 59 to the outer sides of the bonding head 419 for bonding. Two third brake motors 515 drive the two cutters 517 to cut the film applied by the lead frame bonding machine 3. After cutting, the electric push rods 58 return to their original position. The second flat brake motor 520 drives the rectangular block 51 to rotate 90 degrees. Similarly, the first flat brake motor 56 and the two rectangular rods 59 drive the two cutters 517 to bond the film. On the other two sides of the outer wall of the head 419, two cutters 517 are driven by two third brake motors 515 to cut the film of the lead frame film applicator 3; and the cutting of the film of the lead frame film applicator 3 by this device will not break the film of the lead frame film applicator 3, so as to repeatedly apply the film to the lead frame; when applying the film to the lead frame, the lead frame will have different sizes, and the operator only needs to change the size of the bonding pressure head 419. The cutting device 5 can also cooperate with bonding pressure heads 419 of different sizes, which has a certain degree of versatility and flexibility, improves the versatility and cutting accuracy of the lead frame after film application, and improves the film application quality of the lead frame.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film-applying device for a lead frame, characterized in that, include: The right-angle support plate (1) can support the operation of the entire device; The lead frame conveyor (2) is located at the center of the top surface of the bottom of the right-angle support plate (1); The lead frame film applicator (3) is located at the bottom inside of the right-angle support plate (1), and the lead frame film applicator (3) is located directly above the lead frame conveyor (2) and at a certain distance. The pressing device (4) is located at the center of the top inner side of the right-angle support plate (1), and the pressing device (4) can press down the lead frame to apply the film. The cutting device (5) is sleeved on the outer wall of the moving end of the pressing device (4), and the cutting device (5) can cut the lead frame film applicator (3) along the four sides of the moving end of the pressing device (4). The pressing device (4) includes: A rectangular support block (41) is located at the center of the top inside the right-angle support plate (1), and a first chamber (42) is provided inside the rectangular support block (41). A support plate (43) is disposed at one end of the inner wall of the first chamber (42); The rotating column (44) is set at the center of the outer wall of the support plate (43) via the first bearing, and both ends of the rotating column (44) extend outward. The first drive assembly is located at the right end of the rotating column (44); The second drive assembly is located at the left end of the rotating column (44); The bonding head (419) is located at the moving end of the second drive assembly; The first driving component includes: The first gear (45) is located at the right end of the rotating column (44); A support platform (46) is located at the center of the bottom right side of the outer wall of the support plate (43); The second gear (47) consists of two gears, which are respectively set at the right corners of both ends of the support platform (46) via two second bearings; There are two first brake motors (48), which are respectively located on the bottom right corners of the support platform (46). The output ends of the two first brake motors (48) pass through the bottom of the support platform (46) and are respectively connected and fixed to the two second gears (47). A cylindrical block (49) is disposed at the center of the right end of the top surface of the support platform (46); A grooved plate (410) is disposed on the top surface of the cylindrical block (49); There are two L-shaped blocks (411), which are respectively embedded in the two ends of the groove plate (410), and both L-shaped blocks (411) can be limited to move along the groove of the groove plate (410); A large gear (412) is mounted on the top left end of one of the L-shaped blocks (411) via a second bearing; The pinion (413) is mounted on the top left end of another L-shaped block (411) via a third bearing; There are two second brake motors (414), which are respectively located at the top right end of the two L-shaped blocks (411). The output ends of the two second brake motors (414) are respectively connected and fixed to the right end of the large gear (412) and the small gear (413). There are two first racks (415), which are respectively disposed at one end of the bottom side of the two L-shaped blocks (411). The two first racks (415) mesh with the two second gears (47).

2. The film-applying device for a lead frame according to claim 1, characterized in that, One of the first brake motors (48) rotates to drive a second gear (47) to move an L-shaped block (411) within the groove of the slotted plate (410) via a first rack (415), thereby causing the large gear (412) to contact and mesh with the first gear (45), and the rotating column (44) is rotated by a second brake motor (414) through the large gear (412) to drive the first gear (45); another of the first brake motors (48) rotates to drive a small gear (413) to contact and mesh with the first gear (45), and the rotating column (44) is rotated by another second brake motor (414).

3. The film-applying device for a lead frame according to claim 2, characterized in that, The second driving component includes: The first connecting rod (416) is located at the left end of the rotating column (44); The second link (417) is disposed on the top left side of the first link (416) via the fourth bearing; The movable rod (418) is located on the right side of the bottom end of the second connecting rod (417) via the fifth bearing. The movable rod (418) extends outward through the bottom surface of the outer wall of the rectangular support block (41), and the movable rod (418) can be limited to move within the bottom surface of the rectangular support block (41). The rotating column (44) rotates and drives the first connecting rod (416) to drive the second connecting rod (417) to move the movable rod (418) up and down, thereby driving the pressing head (419) to move up and down.

4. A film-applying device for a lead frame according to claim 3, characterized in that, The cutting device (5) includes: A rectangular block (51) is fitted onto the bottom outer wall of the movable rod (418). A second chamber (52) is provided inside the rectangular block (51). Movable grooves (53) are provided at the bottom corners of the front and rear ends of the rectangular block (51), and the two movable grooves (53) are diagonally opposite each other. The third drive assembly is located at the bottom center of the second chamber (52), and the two moving ends of the third drive assembly are respectively embedded in the two moving slots (53); Two electric push rods (58) are respectively located at the two moving ends of the third drive assembly; Two rectangular rods (59) are respectively set on the bottom surface of the two electric push rods (58), and T-shaped grooves (510) are respectively opened on one side of the outer wall of the two rectangular rods (59). The fourth drive assembly consists of two sets, each symmetrically positioned at one end within one of the two T-shaped grooves (510); The fifth driving component is located at one end of the bottom surface of the rectangular block (51).

5. A film-applying device for a lead frame according to claim 4, characterized in that, The third driving component includes: The third gear (54) is sleeved on the outer wall of the moving rod (418) through the sixth bearing, and the third gear (54) is located at the bottom center inside the second chamber (52); There are two second racks (55), which are respectively located at the left and right ends of the third gear (54). One end of each of the two second racks (55) is embedded in one of the two movable slots (53). The first flat brake motor (56) is disposed on the top surface near the center of the second chamber (52); The fourth gear (57) is located at the output end of the first flat brake motor (56), and the fourth gear (57) meshes with the first flat brake motor (56).

6. A film-applying device for a lead frame according to claim 5, characterized in that, The first flat brake motor (56) rotates and drives the fourth gear (57) to cause the third gear (54) to drive the two second racks (55) to extend and retract within the two moving slots (53).

7. A film-applying device for a lead frame according to claim 6, characterized in that, The fourth driving component includes: The third rack (511) is disposed on the bottom surface of the rectangular rod (59); One end of the T-shaped rod (512) is embedded in the T-shaped groove (510), and the T-shaped rod (512) can be limited to move within the T-shaped groove (510); A bearing housing (513) is disposed at one end of the T-shaped rod (512); The fifth gear (514) is located at one end of the rotating end of the bearing housing (513), and the fifth gear (514) meshes with the third rack (511); The third brake motor (515) is located at the other end of the rotating end of the bearing housing (513); A connecting block (516) is disposed on the bottom surface of the bearing seat (513); The cutter (517) is located at one end of the bottom surface of the connecting block (516); the third brake motor (515) rotates to drive the fifth gear (514) to move on the tooth surface of the third rack (511), and moves within the T-shaped groove (510) through the T-shaped rod (512), thereby driving the cutter (517) to move left and right.

8. A film-applying device for a lead frame according to claim 7, characterized in that, The fifth driving component includes: The sixth gear (518) is sleeved on the outer wall of the moving rod (418) through the seventh bearing, and the top surface of the sixth gear (518) is fixedly connected to the center of the bottom surface of the rectangular block (51). A right-angle plate (519) is disposed at one end of the bottom surface of the rectangular block (51); The second flat brake motor (520) is located at the center of the top surface of the bottom of the right angle plate (519); The seventh gear (521) is located at the output end of the second flat brake motor (520). The seventh gear (521) meshes with the sixth gear (518). The second flat brake motor (520) rotates to drive the seventh gear (521) to rotate on the outer tooth surface of the sixth gear (518), thereby driving the rectangular block (51) to rotate on the outer wall of the moving rod (418).

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